* Present rooms are tracked by Omnibot.Core now, instead of Omnibot.State * Channel synchronization is done through Omnibot.Core instead of Omnibot.Irc * Add Omnibot.Module.on_init/1 callback, which returns a "state" value for the module to keep track of. By default, the state is nil. Signed-off-by: Alek Ratzloff <alekratz@gmail.com>